/**
 * Created by JetBrains WebStorm.
 * User: Liucw
 * Date: 12-8-29
 * Time: 下午9:14
 * To change this template use File | Settings | File Templates.
 */
Vector3 = function(x,y,z){
    this.x = x||0;
    this.y = y||0;
    this.z = z||0;
};